scholarly journals Motion of Low-Energy Solar Cosmic Ray Particles in the Earth's Magnetic Field

1961 ◽  
Vol 12 (2) ◽  
pp. 59-69 ◽  
Author(s):  
Kunitomo SAKURAI
Keyword(s):  
Magnetic Field ◽  
Cosmic Ray ◽  
Low Energy ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

Determination of the effective charge of solar cosmic-ray nuclei using the Earth's magnetic field

1984 ◽  
Vol 4 (2-3) ◽  
pp. 169-172
Author(s):  
S. Fischer ◽  
M. Vandas ◽  
K. Kudela ◽  
S.N. Kuznetsov ◽  
V.N. Lutsenko
Keyword(s):  
Magnetic Field ◽  
Effective Charge ◽  
Cosmic Ray ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

Comparison and Time Evolution of the Geomagnetic Cutoff at the ISS Position: Internal vs External Earth’s Magnetic Field Models

2017 ◽  
Vol 13 (S335) ◽  
pp. 105-108
Author(s):  
Matteo J. Boschini ◽  
Stefano Della Torre ◽  
Massimo Gervasi ◽  
Davide Grandi ◽  
Giuseppe La Vacca ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Activity ◽  
Large Fraction ◽  
Cosmic Ray ◽  
High Solar Activity ◽  
Earth’S Magnetic Field ◽  
Magnetic Field Data ◽  
Geomagnetic Cutoff ◽  
Earth's Magnetic Field ◽  
Ray Trajectories

AbstractOur back-tracing code (GeoMagSphere) reconstructs the cosmic ray trajectories inside the Earth’s magnetosphere. GeoMagSphere gets the incoming directions of particles entering the magnetopause and disentangles primary from secondary particles (produced in atmosphere) or even particles trapped inside the Earth’s magnetic field. The separation of these particle families allows us to evaluate the geomagnetic rigidity cutoff. The model can be used considering the internal symmetric (IGRF-12) magnetic field only, or adding the asymmetric external one (Tsyganenko models: T89, T96 or TS05). A quantitative comparison among these models is presented for quiet (solar pressure Pdyn < 4 nPa) and disturbed (Pdyn > 4 nPa) periods of solar activity, as well as during solar events like flares, CMEs. In this analysis we focused our attention on magnetic field data in magnetosphere, from Cluster, and simulated cosmic rays for a generic detector on the ISS as for example AMS-02. We found that high solar activity periods, like a large fraction of the period covering years 2011-2015, are better described using IGRF+TS05 model. Results, i.e. the average vertical rigidity cutoff at the ISS orbit, are shown in geographic maps of 2° × 2° cells.

LOW ENERGY γ-RAY DETECTION (E ≤ 30 GEV): EFFECT OF EARTH'S MAGNETIC FIELD AND A NOVEL TRIGGER TECHNIQUE

2005 ◽  
Vol 20 (29) ◽  
pp. 7006-7008 ◽  
Author(s):  
◽  
R. DE LOS REYES ◽  
E. OÑA-WILHELMI ◽  
J. L. CONTRERAS ◽  
O. C. DE JAGER ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Low Energy ◽  
Extensive Air Showers ◽  
Large Collection ◽  
Earth’S Magnetic Field ◽  
Air Showers ◽  
Cherenkov Telescope ◽  
Earth's Magnetic Field ◽  
Γ Ray

Here we discuss two related aspects of the detection of low energy gammas by IACT's (Imaging Atmospheric Cherenkov Telescope): the effect of the Earth's magnetic field and a possible novel trigger technique. The Earth's magnetic field affects the development of extensive air showers (EAS), spreading the collected photons and, therefore, decreasing the sensitivity of the Cherenkov telescope. The new effects that appear in low energy showers can be partially offset modifying the trigger criteria. The result is a large collection area (> 1000 m2) below 10 GeV for a typical 17 m class telescope, increasing its sensitivity at these energies.

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